SF₆ Gas Insulated Switching Station
The SF₆ Switching Station is a compact medium-voltage distribution solution designed to control, protect, and distribute electrical power within secondary distribution networks. Installed downstream of primary substations, it provides reliable switching, sectionalizing, and protection for multiple outgoing feeders while maintaining the same voltage level on both the incoming and outgoing sides.
Designed with a fully sealed SF₆-insulated switching system, the switching station offers excellent insulation performance, high operational safety, and minimal maintenance requirements. Its modular design allows flexible configuration to meet different distribution network layouts and future expansion needs.
The switching station is widely used in utility power distribution systems, industrial facilities, transportation infrastructure, renewable energy projects, and commercial power networks. It is particularly suitable for applications requiring reliable power continuity, compact installation, and high environmental adaptability.
Manufactured using high-quality stainless steel enclosures and advanced electrical components, our SF₆ Switching Station ensures long service life, stable performance, and dependable operation even under demanding conditions.
- Compact and modular design
- SF₆ gas insulated switching system
- Reliable power distribution and sectionalizing
- High operational safety with complete mechanical interlocking
- Low maintenance requirements
- Flexible incoming and outgoing feeder configurations
- Stainless steel enclosure with excellent corrosion resistance
- Suitable for indoor and outdoor installation
- Easy installation and future system expansion
- OEM & customized solutions available
| No. | Item | Unit | Specification |
|---|---|---|---|
| 1 | Rated Voltage | kV | 12 / 24 |
| 2 | Rated Current | A | 630 |
| 3 | Rated Short-Time Withstand Current (3 s) | kA | 20 |
| 4 | Rated Peak Withstand Current | kA | 50 |
| 5 | Power Frequency Withstand Voltage (Phase-to-Phase / Phase-to-Earth / Across Open Contacts) | kV | 42 / 48 |
| 6 | Lightning Impulse Withstand Voltage | kV | 85 |
| 7 | Secondary Circuit Power Frequency Withstand Voltage | kV | 2 |
| 8 | Rated Current Breaking Operations | Operations | 100 |
| 9 | Rated Cable Charging Breaking Current | A | 10 |
| 10 | Rated Closed-Loop Breaking Current | A | 630 |
| 11 | Enclosure Protection Degree | IP | IP66 |
| 12 | SF₆ Gas Pressure (Gauge Pressure) | kPa | 40 |
| 13 | SF₆ Gas Leakage Rate | %/year | ≤0.1% (≤1‰) |
| 14 | Maximum Cable Cross-Section | mm² | ≤400 |
The switching station efficiently distributes electrical power to multiple feeders while maintaining stable system operation and minimizing service interruptions.
Its integrated modular structure significantly reduces installation space, making it suitable for urban substations and compact electrical rooms.
Complete mechanical and electrical interlocking systems prevent incorrect operation and improve operator safety during switching and maintenance.
The sealed SF₆ insulated system effectively protects internal components from dust, humidity, and environmental contamination.
Manufactured with premium materials and precision engineering, the switching station provides stable performance with low maintenance throughout its service life.
The SF₆ Switching Station is suitable for a wide range of medium-voltage power distribution applications, including:
- Utility Distribution Networks
- Railway Power Supply Systems
- Metro and Urban Rail Transit
- Industrial Manufacturing Plants
- Commercial Buildings
- Renewable Energy Projects
- Solar Power Stations
- Wind Farms
- Mining Operations
- Airports
- Data Centers
- Oil & Gas Facilities
- Residential Distribution Networks
It is especially suitable for railway traction power systems, where switching stations provide reliable feeder sectionalizing, fault isolation, and continuous power supply.
The SF₆ Switching Station receives electrical power from the upstream distribution network and distributes it safely to multiple outgoing feeders.
Each feeder is equipped with a load break switch or circuit breaker to provide switching, protection, and isolation functions. In the event of a fault, the protection system isolates only the affected section, minimizing outage areas and improving system reliability.
The fully sealed SF₆ gas insulation ensures excellent dielectric performance while reducing maintenance requirements and extending equipment service life.
- Ambient Temperature: -35°C to +40°C
- Altitude: ≤2000 m
- Relative Humidity: Daily average ≤95%; Monthly average ≤90%
- Seismic Resistance: Up to Grade 8
The switching station can be customized according to different project requirements.
Available options include:
- Busbar extension
- Motorized load switch (AC220V / AC110V)
- Short-circuit and earth fault indicators
- Current Transformer (CT)
- Potential Transformer (PT)
- Voltage detection devices
- Auxiliary contacts
- Trip coil
- Fuse blown indication
- Pressure gauge with signal output
- Remote monitoring interface
- SCADA communication module
The enclosure is manufactured from 2 mm stainless steel or Aluzinc steel plate, providing excellent corrosion resistance and long-term durability.
Main features include:
- Compact footprint
- Fully enclosed metal structure
- Modular panel design
- Mechanical interlocking system
- User-defined panel layout
- Outdoor corrosion protection
- Green powder-coated finish or customized colors
The standard switching station includes:
- Incoming and outgoing load break switches
- 630A main busbar
- Complete mechanical interlocking
- Visible isolation position
- Fully enclosed insulated metal compartments
- Earthing switch
- High-strength operating mechanism
- Maintenance-friendly modular structure
Every switching station undergoes comprehensive factory testing before shipment, including:
- Mechanical operation test
- Power frequency withstand voltage test
- Insulation resistance test
- Contact resistance measurement
- SF₆ gas leakage inspection
- Functional verification
- Final assembly inspection
- Factory acceptance testing
This ensures consistent product quality and reliable field performance.
Changyun Intelligent provides comprehensive OEM and ODM services for distributors, EPC contractors, switchgear manufacturers, and utility companies.
Customization options include:
- Incoming and outgoing feeder configuration
- Company logo and nameplate
- Cabinet dimensions
- Busbar arrangement
- Protection relay selection
- Communication protocols
- Panel color
- Control wiring
- Technical documentation
- Packaging
An SF₆ Switching Station is a medium-voltage switching device used to distribute electrical power, isolate faults, and improve the reliability of power distribution networks through SF₆ gas insulation.
It offers compact design, high insulation performance, reliable operation, low maintenance, flexible configuration, and excellent safety for modern medium-voltage distribution systems.
Yes. We provide customized feeder layouts, cabinet dimensions, protection configurations, communication interfaces, and OEM branding according to project requirements.
Yes. It is widely used in railway traction power distribution, metro systems, and transportation infrastructure where reliable power continuity is essential.
The equipment is designed and manufactured according to applicable IEC standards for medium-voltage switchgear and power distribution equipment.
Yes. We provide product selection assistance, engineering consultation, installation guidance, commissioning support, and after-sales service.
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